Switch On-Resistance
MAX1703
1-Cell to 3-Cell, High-Power (1.5A),
Low-Noise, Step-Up DC-DC Converter
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(CLK/SEL = AIN = ON = POKIN = FB = PGND = GND, OUT = POUT, LXP = LXN, V
OUT
= 5.3V (Note 1), T
A
= 0°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
OUT, ON, AO, POK to GND .....................................-0.3V to +6V
PGND to GND.....................................................................±0.3V
LXP, LXN to PGND .................................-0.3V to (V
POUT
+ 0.3V)
POUT, CLK/SEL, AIN, REF, FB,
POKIN to GND.......................................-0.3V to (V
OUT
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
Narrow SO (derate 8.70mW/°C above +70°C) .............696mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
I
LOAD
< 1mA, T
A
= +25°C (Note 3)
CLK/SEL = GND
CLK/SEL = GND
(Note 2)
CLK/SEL = OUT
N-channel
V
ON
= V
LXN
= V
OUT
= 5.5V
ON = OUT
CLK/SEL = OUT, no load to full load
V
LXP
= 0V, V
OUT
= V
ON
= 5.5V
(Note 5)
V
OUT
= 1.5V
V
FB
< 0.1V, CLK/SEL = OUT,
0 ≤ I
LX
≤ 1.1A, V
BATT
= 3.7V
Adjustable output, CLK/SEL = OUT,
0 ≤ I
LX
≤ 1.1A, V
BATT
= 2.2V, V
OUT
= 3.3V
CLK/SEL = OUT (Note 1)
V
FB
= 1.25V
CLK/SEL = GND (Note 1)
CONDITIONS
mA20 160 260P-Channel Turn-Off Current
mA500 800 1100
N-Channel Current Limit
mA2200 2700 3200
0.075 0.13 Ω
0.14 0.25
µA0.1 20LXN Leakage Current
µA0.1 20POUT, LXP Leakage Current
µA150 300Supply Current in Low-Noise Mode
µA65 120Supply Current in Low-Power Mode
V0.9 1.1Minimum Start-Up Voltage
V0.7 5.5Input Supply Range
µA0.1 20Supply Current in Shutdown
%-1.6Load Regulation (Note 6)
V2.0 2.15 2.3Output Voltage Lockout Threshold
V2.5 5.5Output Voltage Adjust Range
kHz40 140 300Frequency in Start-Up Mode
V4.87 5.05 5.20
Output Voltage
(Note 4)
V1.21 1.24 1.255FB Regulation Voltage
nA0.1 20FB Input Current
UNITSMIN TYP MAXPARAMETER
P-channel 0.13 0.25
Switch On-Resistance
CLK/SEL = GND
CLK/SEL = OUT
Rising V
POKIN
V1.225 1.250 1.275POKIN Trip Level
V
POKIN
= 0.7V nA-20 20POKIN Input Current
I
SINK
(POK) = 1mA, V
OUT
= 3.6V or
I
SINK
(POK) = 20µA, V
OUT
= 1V
V0.03 0.4POK Low Voltage
V
OUT
= V
POK
= 5.5V µA0.01 1POK High Leakage Current
DC-DC CONVERTER
DC-DC SWITCHES
POWER-GOOD COMPARATOR
